Ethylenediaminetetraacetic acid (EDTA) is an aminopolycarboxylic acid with the formula [CH 2 N (CH 2 CO 2 H) 2] 2. This white, water-soluble solid is widely used to bind to iron and calcium ions. It binds these ions as a hexadentate ("six-toothed") chelating agent.What is the difference between EDTA and EGTA?
1.EGTA and EDTA are both chelating agents and appear as white crystalline powders. 2.EGTA is attracted to divalent calcium ions, while EDTA is used for divalent magnesium ions. 3.EDTA has more applications than EGTA.Is EDTA a strong acid?
The structure of EDTA is shown below. However, there are a few organic acids that are quite strong. Trifluoroacetic acid has an approximate pKa of -0.3 (approximate because water levels pKas and the best you can do is between 0–14). Methane sulfonic acid is even stronger coming in at an estimated pKa of -2.6.